burgess



(No Model.)

G. M. BURGESS.

LOOK.

Patented Oct. 21, 1890.

lflliilllilllllll? "ii-mm UNITED STATES PATENT OFFICE.

CHARLES M. BURGESS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELL & ERWVIN MANUFACTURING COMPANY, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters latent No. 438,677, dated October 21, 1890.

Application filed April 26,1890.

T aZZ whom it may concern.-

Be it known that 1, CHARLES M. BURGESS, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Locks and Latches, of which the following is a specification.

My invention relates to improvements in looks and latches; and the objects of my improvement are to simplify the construction of the parts, thereby reducing the cost of the lock, and to avoid as far as possible a multiple of studs in the case, thereby adapting the construction particularly to sheet-metal cases.

In the accompanying drawings, Figure 1 is a front elevation of my lock and latch with the cap-plate removed. Fig. 2 is a detached front view of the lock-tumbler and spring. Fig. 3 is a reverse plan View of the same, and Fig. 4 is a front view of a portion of the case.

A designatesthe latch-bolt, having shoulders 5 5 for being engaged by the spring 6 for forcing the latch-bolt outwardly, the rear end of said latch-bolt being bifurcated for engagement with the arms of the ordinary latchh'ub 7.

B designates the lock-bolt of ordinary construction and provided with a longitudinal slot 8, which receives the stud or stump 9 on the lock-case. The lock-bolt is guided in its longitudinal movements by said stud or stump 9 at its slotted portion and at its outer end by the front 15 of the case, and the latchbolt is guided at one end by the latch-hub and at its outer end by the front 15 of the case. This stud or stump 9 is the only one that is necessary to have in the lock-case in order to make a complete latch and look. I have, however, illustrated the case as provided with a stud 10, upon which to arrange the latch-bolt stop 11 when desired.

0 designates the tumbler, whose operation in connection with the lock-bolt is the same as that of ordinary lever tumblers. I provide said tumbler with a hollow boss or hub 12, by which it is pivoted upon the stud 9,

Serial No, 349,691. (No model.)

and around which the middle portion of the spring 6 is bent. Said tumbler is also pro vided with an upwardly-projecting arm carrying a stud or projection 13 for the upper end of the spring 6 to rest against, and another stud or projection 14 for the opposite end of said spring, all as shownin Figs. 1, 2, and 3, whereby the spring may be mounted upon the tumbler and have its ends prop erly held in position thereon independently of the other parts of the lock. After the lockbolt and latch-bolt are placed within the case the tumbler C is placed in position with the upper end of the spring 6 back of one of the shoulders 5 on the latch-bolt, as shown, so that when the cap-plate is put on the combined lock and latch is complete, the spring 6 acting not only to depress the tumbler, but also to force the latch-bolt outwardly.

I claim as my invention- 1. The combination of the sheet-metal latch and lock-case, the latch-bolt, lock-bolt, tumbler-spring, and a single stump or stud on said case, all operatively combined without the addition of other elements, substantially as described, and for the purpose specified.

2. In a lock, the tumbler C, having the hub 12, studs or projections 13 and 14, and the spring 63, mounted thereon, substantially as described, and for the purpose specified.

3. The combination of the case having the stud or stump 9, the lock-bolt having the slot 8, the latch hub, the latch-bolt, the tumbler C, having hub 12, projections 13 and 14., and spring 6, mounted on said tumbler with its ends engaging said projections, substantially as described, and for the purpose specified.

4. The combination of the case having the latch-mortise and latch-hub bearing, the latch-bolt with its outer end resting in said mortise and having the bifurcated inner end and middle shoulders 5 5, the latch-hub supported in its bearing in the case and received by said bifurcated end of said latch, the lockbolt, the tumbler, and the spring, the latter being mounted on said tumbler with its ends confined thereon to limit its expansion, and with one of its ends resting upon one of said shoulders 5, substantially as described, and tially as described, and for the purpose specifor the purpose specified. fied.

5. The combination of a latch-bolt lockbolt, tumbler, and spring, the latter Having CHAS BURGESS 5 its ends confined on said tumbler to limit its \Vitnesses:

expansion and acting as the spring for press- THOS. S. BISHOP,

ing both the latch-bolt and tumbler, substan- M. S. VVIARD. 

